The very first tennis balls date back as early as the 15th century and were made of different materials, mostly from leather stuffed with human and horse hair or wool. The Scottish craftsmen used the stomach of a sheep or goat that they wrapped with wool and tied with a rope. Around 300 million tennis balls are produced each year and Yellow tennis balls were first used at Wimbledon in 1986.There are more than 200 tennis ball brands that have been approved by the ITF. The most expensive material when manufacturing a tennis ball is the felt covering the ball.If you’re looking for a top-quality, instant-favorite sweatshirt, you’ve come to the right place! Our Premium Hoodie from the FamiLane Collection is everything you could ask for: it’s warm and cozy with a tailored and feminine fit, and it's built to last. This item runs small.